A Single-center, Retrospective Study of Focal Segmental Glomerulosclerosis after Kidney Transplantation: Evolutive Analysis.

Background: Focal segmental glomerulosclerosis (FSGS) has a high recurrence rate after renal transplantation, which significantly impacts renal graft survival. However, the factors related to recurrence remain unclear. Objective: This study aimed to analyze focal segmental recurrence and evolution of glomerulosclerosis after renal transplantation. Methods: This was a descriptive, retrospective study involving 88 adults who underwent renal transplantation within a 15-year period. Demographic and clinical characteristics, as well as the occurrence of graft loss, were analyzed. Over the study period, 88 patients with a diagnosis of FSGS after transplantation were identified. Results: The mean age of the patients (n=54, males) was 29.1 years. Transplants with deceased donors predominated (60.9%). Calcineurin and prednisone inhibitors were present in 96.4% of the initial immunosuppression regimens. The mean time of onset of proteinuria greater than 0.5 g/g was 20.51 days. At 60 months after transplantation, 44.16% of the patients had partial remission, 25.97% had complete remission, and 29.87% had no remission. However, 50.60% of the patients developed graft loss throughout the analyzed period. Eight patients (9.4%) died within 60 months, of which five (62.5%) were attributed to infection. Conclusion: Our results indicate that FSGS after renal transplantation is a disease of high recurrence that is commonly precocious, and the histological alterations in light microscopy are not simultaneous to the appearance of proteinuria. Hypertension is considered a risk factor causing progression and recurrence. Thus, prospective studies are required to better evaluate progression and recurrence factors.